Soybean cyst nematode-resistant soybean varieties for Iowa

Transcription

1 Soybean cyst nematode-resistant soybean varieties for Iowa Prepared by Gregory L. Tylka, Department of Plant Pathology Soybean cyst nematode (SCN) is widespread in Iowa. The nematode reproduces quickly (several life cycles per season), survives in the soil for up to 10 years in the absence of a soybean crop, and can cause substantial yield losses, particularly in dry years. Resistance is very effective for managing SCN. The results below illustrate how SCN-resistant varieties maintain acceptable yields and keep SCN populations in check. The data are average yields and end-of-season SCN population densities from two locations of the ISU SCNresistant Soybean Variety Trial Program in 2007 in which resistant and susceptible varieties were grown. On average, the SCN-resistant soybean varieties yielded 7 to 15 bushels per acre more than the susceptible varieties in the variety trial experiments. In addition to yielding more, the resistant varieties kept the SCN population densities from increasing, but the susceptible varieties allowed the SCN populations to increase to 4,700 to more than 15,000 eggs per 100 cc at harvest. Yield (bushels per acre) End-of-year SCN population densities (eggs per 100 cc soil) Variety trial location SCN-resistant SCN-susceptible SCN-resistant SCN-susceptible Albert City, IA ,004 15,188 Urbana, IA ,126 4,781 The number of soybean varieties with genetic resistance to SCN available in maturity groups O, I, II, and III has increased dramatically since the early 1990s (Figure 1). Today, most soybean seed companies have SCN-resistant soybean varieties available for Iowa growers. Most of the SCN-resistant varieties now possess the Roundup Ready trait, and several of the resistant varieties possess the low-linolenic acid trait Figure 1. Number of maturity group O, I, II, and III SCNresistant soybean varieties available to Iowa soybean growers, (data unavailable for 1992 and 2005). What should one consider when choosing an SCN-resistant variety? Yield Potential: The most important characteristic of SCN-resistant soybean varieties is yield potential in SCN-infested fields. The yield of SCN-resistant varieties can vary greatly and cannot be predicted by yield performance in non-infested fields. Consequently, many SCN-resistant soybean varieties are evaluated each year in the Iowa State University (ISU) SCN-resistant Soybean Variety Trials. The results of these variety trials are published annually in ISU Extension publication IPM 52, which can be obtained by calling the ISU Department of Plant Pathology ( ) and on the Internet at Iowa soybean growers are encouraged to consult this publication for guidance on the relative performance of SCN-resistant soybean varieties. However, the variety trial data are from a limited number of locations and should be used only as a beginning point for developing an SCN management program for any specific field. The performance of individual SCN-resistant soybean varieties will vary PM 1649 Revised December 2007

2 among locations and years, so growers are encouraged to evaluate several SCN-resistant soybean varieties at their own locations to determine the best varieties for their local conditions. Effect on SCN Population Densities: In addition to yield, growers must consider the effectiveness of the varieties in suppressing reproduction of the nematode. SCN populations may not be kept in control despite high yields because SCN-resistant varieties (even high-yielding varieties) can vary considerably in how well they control population densities. For example, the yields of the top three conventional (non-roundup Ready ) soybean varieties that were evaluated in the north-central Iowa location of the ISU SCN-resistant Soybean Variety Trials in 2001 are shown in Figure 2 below. Note that there is no significant difference among the yield of these three varieties. However, one of the varieties did not control the nematode as well as the other two, as illustrated by the end-of-season SCN egg population densities (shown in Figure 3). Such a large difference in nematode control among high-yielding soybean varieties is not rare. Consequently, growers should consider how SCN-resistant soybean varieties affect SCN population densities in addition to how well they yield in order to ensure maximum soybean productivity of their land for years to come. Yield (bu/acre) Three of the best-yielding conventional non-roundup Ready soybean varieties, 2001 Figure 2. Yield of the three best-yielding conventional (non-roundup Ready ) soybean varieties in a north-central Iowa variety trial location in The least-significantdifference value was 4.9. Eggs/100 cc soil at harvest Three of the best-yielding conventional non-roundup Ready soybean varieties, 2001 Figure 3. End-of-season SCN egg population densities in plots of the three best-yielding conventional (non-roundup Ready ) soybean varieties in a north-central Iowa variety trial location in The least-significant-difference value was 5,430. Other Defensive Traits: SCN population densities tend to be greater as soil ph increases from 5.5 to 8.0, and iron deficiency chlorosis can be a problem once soil ph rises above 7.4 or so. Soybean varieties vary in their sensitivity to high ph soils and iron deficiency chlorosis. Because high population densities of SCN frequently occur in high ph soils, many growers need SCN-resistant soybean varieties that also have good tolerance to iron deficiency chlorosis. Iron deficiency chlorosis tolerance scores are provided for most of the SCN-resistant varieties listed in this publication. Minimizing the effects of iron chlorosis will reduce the overall stress of the soybean crop, thus also reducing the yield-reducing effect of SCN. SCN is not the only soybean pathogen that occurs in Iowa soybean fields. Other common soybean diseases in Iowa include brown stem rot, Phytophthora stem and root rot, sudden death syndrome, and white mold. Consequently, a soybean variety with multiple disease resistance is often needed. And some diseases, such as brown stem rot and sudden death syndrome, are made more severe by SCN. Growers must observe their soybean fields for the presence of all common soybean diseases and then decide which of the diseases cause the most severe and consistent yield loss from year to year. SCN is among the most damaging and persistent soybean pathogens that occur in the state. 2

3 Should growers attempt to manage the different types of SCN resistance that are used? Currently, there are three main genetic sources for SCN resistance genes in commercial soybean varieties, namely PI88788, Peking, and PI (also known as Hartwig and CystX resistance). Each of these sources of SCN resistance contains several genes that confer resistance to the nematode. Consequently, soybean varieties developed from the various sources of resistance may not all contain the same genes in the same combinations. All sources of SCN resistance allow limited reproduction of only a few nematodes, and limited reproduction by a few nematodes on a resistant soybean variety does not pose a problem in a single growing season. However, if soybean varieties containing the same source of resistance are grown repeatedly for many years, a population of nematodes that readily feed on that source of resistance may build up. Thus, use of resistant soybean varieties, particularly any single SCN-resistant variety, should not be considered the sole solution for managing SCN. Reports of SCN populations able to reproduce well on SCN-resistant soybean varieties with PI88788 source of resistance has increased dramatically in the past few years. This may be a consequence of using resistant varieties with PI88788 source of resistance numerous times in the past several years. Unfortunately, of the 763 SCN-resistant soybean varieties included in this publication, only 16 have something other than PI88788 listed as a specific source of resistance. Iowa State University recommends growing non-host crops, such as corn, in conjunction with soybean varieties with different sources of resistance in a crop rotation scheme to discourage the buildup of nematode populations that reproduce readily on resistant soybean varieties. If growers cannot utilize soybean varieties with different sources of SCN resistance in successive soybean crops, they should try to grow different SCN-resistant varieties derived from the common source of SCN resistance, PI88788 (Figure 4). When should growers begin to use resistant soybean varieties for management of SCN? Iowa State University recommends that SCN-resistant soybean varieties be grown in fields with low or moderate SCN population densities, even fields with very low levels Year 1 PI88788 SCN-resistant soybean Year 6 Nonhost crop Year 2 Year 5 Nonhost crop SCN-susceptible soybean of the nematode. The reason for utilizing SCN-resistant soybeans in fields with low population densities is that the nematode can reduce soybean yields significantly at low population densities under hot, dry weather conditions. Furthermore, ISU SCN-resistant Soybean Variety Trial data show that many currently available SCN-resistant soybean varieties have high yield potential even when grown in fields with low population densities of the nematode, so there s not much of an economic risk in using an SCN-resistant soybean variety in a field with low population densities of the nematode. Using SCNresistant soybean varieties immediately once an infestation is discovered will stop the increase in SCN population densities and allow for greater success at implementing the recommended crop rotation scheme (Figure 4). The following list is a compilation of soybean varieties in maturity groups O, I, II, and III that are marketed as having resistance to SCN. The resistance ratings reported here were provided by the seed companies offering these varieties for sale. Iowa State University has not verified the resistance claims. Different seed companies may use different criteria and have data from different locations, so it is not recommended to use these ratings for comparisons between companies. Keep in mind that companies may not use the same standards to develop these ratings. Varieties are arranged in tables by maturity group and brand. Year 3 SCN-resistant soybean different from Year Year 4 Nonhost crop Figure 4. Recommended crop rotation for fields with low or moderate SCN population densities. 3

4 Table 1. Soybean cyst nematode-resistant soybean varieties for late maturity group 0 and maturity group I. Albert Lea Seed House, 1414 W. Main, Albert Lea, MN 56007, , seedhouse@alseed, Viking 1788NRR 1.7 Y 2.3 PI88788 Viking 1978CBR 1.9 Y 2.0 Peking/PI88788 Viking 1908CNRR 1.9 Y 2.1 PI88788 Crow's Hybrids, 612 E. Dunlap St., P.O. Box 157, Kentland, IN 47951, , Crow's Hybrids C1415R 1.4 Y 2.0 PI88788 Crow's Hybrids C1615R 1.6 Y 2.0 PI88788 Crow's Hybrids C1815R 1.8 Y 1.9 PI88788 Dairyland Seed Co., Inc., 3570 Hwy. H, West Bend, WI 53095, , Dairyland 0401/RR 0.4 Y 2.0 Not Given Dairyland 0701/RR 0.7 Y 2.1 Not Given Dairyland 0903/RR 0.9 Y 2.3 Not Given Dairyland 091/RR 0.9 Y 2.9 Not Given Dairyland 1301/RR 1.3 Y 2.7 Not Given Dairyland 1302/RRSTS 1.3 Y 2.5 Not Given Dairyland 1500/RRSTS 1.5 Y 2.7 Not Given Dairyland 1601/RR 1.6 Y 2.4 Not Given Dairyland 1701/RRSTS 1.7 Y 2.4 Not Given Dairyland 1850/RRSTS 1.9 Y 2.7 Not Given Dairyland 199/RRSTS 1.9 Y 2.3 Not Given Dyna-Gro Seeds, 104 Harrison, Emmetsburg, IA 50536, , Dyna-Gro Seeds 32G Y 1.8 PI88788 Dyna-Gro Seeds 39D Y 1.5 PI88788 Dyna-Gro Seeds 36B Y 1.8 PI88788 Dyna-Gro Seeds 32K Y 1.5 PI88788 Dyna-Gro Seeds 33X Y 1.5 PI88788 Excel Brand, 116 E. State, Camp Point, IL 62320, EXCEL 8196NNRR/STS 1.8 Y 2.3 PI88788 EXCEL 8203HPRR 1.8 Y 2.6 Hartwig/Peking Farm Advantage, 1275 Hwy. 69, Belmond, IA 50421, , farmadv@kalnet.com, Farm Advantage 7084N 0.8 Y 2.2 PI88788 Farm Advantage 7174N 1.7 Y 2.5 PI88788 Farm Advantage 7183N 1.8 Y 2.0 PI88788 Farm Advantage 7194N 1.9 Y 2.3 PI88788 Fontanelle Hybrids, th St., Fontanelle, NE , , spike@fontanelle.com, Fontanelle 7763 NRR 1.6 Y 2.9 PI88788 Garst Seed Company, th Street, Slater, IA 50244, 888-GO-GARST, garstguy@garstseedco.com, NK S08-M8 0.8 Y 3.0 PI88788 NK S13-K2 1.3 Y 3.0 PI88788 NK H-1604RR 1.6 Y 3.0 PI88788 NK S17-A1 1.7 Y 4.0 PI88788 NK S19-L7 1.9 Y 2.0 PI88788 Great Lakes Hybrids, 9915 W M-21, Ovid, MI 48866, , Great Lakes Hybrids GL 1809RR 1.8 Y 2.5 PI88788 Hoegemeyer Hybrids, 1755 Hoegemeyer Rd., Hooper, NE 68031, 800-AG Line-1 ( ), askus@hoegemeyer.com, Hoegemeyer Hybrids 181NRR 1.8 Y 2.5 PI

5 Table 1. Soybean cyst nematode-resistant soybean varieties for late maturity group 0 and maturity group I, continued. Iowa State University Research Foundation, 310 Lab of Mechanics, Ames, IA , , ISU IA N 3.3 PI88788 ISU IA1008LF 1.0 N Not Given PI88788 ISU IA N 3.9 PI88788 Kaltenberg Seeds, P.O. Box 278, 5506 State Rd. 19, Waunakee, WI , , ksfseeds@chorus.net, Kaltenberg KB166RR 1.6 Y 2.0 PI88788 Kaltenberg KB177RR 1.7 Y 2.0 PI88788 Kaltenberg KB196RR 1.9 Y 2.0 PI88788 Kaltenberg KC N 3.0 PI88788 Kruger Seeds, Inc., P.O. Box A, Dike, IA 50624, , info@krugerseed.com, Kruger K-147RR/SCN 1.4 Y 2.0 PI88788 Kruger K-167RR/SCN 1.6 Y 3.0 PI88788 Kruger K-170RR/SCN 1.7 Y 3.0 PI88788 Latham Seed Company, th St., Alexander, IA 50420, , LATHAM L1401RX 1.4 Y 2.8 CystX LATHAM E1738R 1.7 Y 2.1 PI88788 LATHAM L1838R 1.8 Y 2.3 PI88788 LATHAM E1983R 1.9 Y 2.2 PI88788 LG Seeds, Shissler Rd., Elmwood, IL 61529, , info@lgseeds.com, LG Seeds C1945NRR 1.9 Y 1.5 PI88788 Merschman Seeds, Inc., 103 Avenue D, West Point, IA 52626, , Merschman Mars 819RR 1.9 Y 2.2 PI88788 Midwest Seed Genetics, 1617 E 10th St., P.O. Box 518, Carroll, IA 51401, , Midwest Seed Genetics GR Y 2.0 PI88788 Midwest Seed Genetics GR Y 2.0 PI88788 Midwest Seed Genetics GR Y 1.9 PI88788 Monsanto Agriculture Research, 3843 Terrace Hill Dr. NE, Cedar Rapids, IA 52402, ASGROW AG Y 2.0 PI88788 Mustang Seeds, 306 S. Washington, Madison, SD 57042, , Mustang M-177NRR 1.7 Y 2.2 PI88788 Mustang M-194NRR 1.9 Y 2.0 PI88788 Mycogen Seeds, 9330 Zionsville Rd., Indianapolis, IN 46268, , Atlas Mycogen 5N152RR 1.5 Y 1.5 PI88788 NC+ Hybrids, 3820 N. 56th St., P.O. Box 4408, Lincoln, NE 68504, , NC+ Hybrids 1A62RR 1.6 Y 2.0 PI88788 NC+ Hybrids 1A81RR 1.8 Y 1.9 PI88788 NuTech Seed LLC, Hwy. 69N, Forest City, IA 50436, , NuTech Y 2.5 PI88788 NuTech Y 2.8 PI88788 NuTech 1717RR/SCN 1.7 Y 2.8 PI88788 NuTech 1808RR/SCN 1.8 Y 2.8 PI88788 NuTech 7193+RR/SCN 1.9 Y 2.7 PI88788 Pannar Seed, US Hwy. 14 East, Huron, SD 57350, , info@pannarusa.com, Pannar 0810NRR 0.8 Y 1.9 PI88788 Pannar 1440NRR 1.4 Y 2.0 PI88788 Pannar 1707NRR 1.8 Y 2.5 PI88788 Pannar 1990NRR 1.9 Y 1.9 PI

6 Table 1. Soybean cyst nematode-resistant soybean varieties for late maturity group 0 and maturity group I, continued. Pioneer Hi-Bred International, Inc., 8100 South 15th St., Lincoln, NE 68512, , Pioneer Hi-Bred Int. 91M Y 2.0 PI88788 Pioneer Hi-Bred Int. 91M Y 3.0 PI88788 Prairie Brand Seed, 15 X Ave., Story City, IA 50248, , Prairie Brand PB 0885NRR 0.8 Y 2.2 PI88788 Prairie Brand PB 1557NRR 1.5 Y 2.4 PI88788 Prairie Brand PB 1585NRR 1.5 Y 1.9 PI88788 Prairie Brand PB 1885NRR 1.8 Y 2.5 PI88788 Prairie Brand PB 1887NRR 1.8 Y 2.2 PI88788 Renk Seed, 6809 Wilburn Rd., Sun Prairie, WI 53590, 800-BUY-RENK, arenk@renkseed.com, Renk Seed rs115rr 1.1 Y 2.2 PI88788 Renk Seed rs124nrr 1.2 Y 1.6 PI88788 Renk Seed rs187nrr 1.8 Y 2.0 PI88788 Renze Hybrids, Kittyhawk Ave., Carroll, IA 51401, , renze@netins.net, Renze R1836SRcn 1.8 Y 2.0 PI88788 Sand Seed Service, Inc., 4765 Hwy. 143, Marcus, IA 51035, , soi@sandsofiowa.com, Sands of Iowa SOI 1867NRR 1.8 Y 2.0 PI88788 Sands of Iowa SOI 1874NRR 1.8 Y 2.5 PI88788 South Dakota State University, NPB247, Box 2140C, Brookings, SD SD Ag. Exp. Station SD1161RR/SCN 1.9 Y Not Given PI88788 Stine Seed Company, 2225 Laredo Trail, Adel, IA 50003, , info@stineseed.com, Stine Y 2.3 PI88788 Stine Y 2.3 PI88788 Stine Y 2.5 PI88788 Stine Y 2.8 PI88788 Trisler Seeds, Inc., 3274 E 800 North Rd., Fairmount, IL 61841, trisler@trisler.com, Trisler Trisoy 1877RR(CN) 1.8 Y 2.0 PI88788 University of Minnesota, Minnesota Agricultural Experiment Station, St. Paul, MN MN Ag. Exp. Station MN0308CN 0.3 N 2.8 PI88788 MN Ag. Exp. Station MN0602CN 0.6 N 2.5 PI88788 MN Ag. Exp. Station MN0606CN 0.6 N 3.5 PI88788 MN Ag. Exp. Station MN0806CN 0.8 N 2.9 PI88788 MN Ag. Exp. Station MN 0902CN 0.9 N 2.8 PI88788 MN Ag. Exp. Station MN1011CN 1.0 N 2.7 PI88788 MN Ag. Exp. Station Freeborn 1.6 N 2.5 PI88788 MN Ag. Exp. Station MN N 3.8 PI88788 Ziller Seed Co., Inc., th St., Bird Island, MN 55310, , zscsales@zillerseed.com, Ziller BT 7062NR 0.6 Y 2.1 PI88788 Ziller BT 7083NR 0.8 Y 1.9 PI88788 Ziller BT 7131NR 1.3 Y 1.5 PI88788 Ziller BT 7156NR 1.5 Y 1.7 PI88788 Ziller BT 7173NR 1.7 Y 2.1 PI88788 Ziller BT 7186NR 1.8 Y 1.7 PI

7 Table 2. Soybean cyst nematode-resistant soybean varieties for maturity group II. Albert Lea Seed House, 1414 W. Main, Albert Lea, MN 56007, , Viking 2088NRR 2.0 Y 1.9 PI88788 Viking 2171CN 2.1 N 1.9 Peking Viking 2238NRR 2.2 Y 2.1 PI88788 Viking 2368CNRR 2.3 Y 2.6 PI88788 Viking 2598NRR 2.5 Y 1.9 PI88788 CROPLAN GENETICS, 1080 County Road F, West, MS5735, Shoreview, MN 55126, , info@croplangenetics.com, CROPLAN GENETICS RC Y 2.5 PI88788 CROPLAN GENETICS RC Y 2.3 PI88788 CROPLAN GENETICS RC2177V 2.1 Y 2.0 PI88788 CROPLAN GENETICS RC Y 2.4 PI88788 CROPLAN GENETICS RC Y 2.5 PI88788 CROPLAN GENETICS RC Y 2.0 PI88788 CROPLAN GENETICS RC Y 3.0 PI88788 CROPLAN GENETICS RC Y 2.5 PI88788 CROPLAN GENETICS RC Y 2.0 PI88788 Crow's Hybrids, 612 E. Dunlap St., P.O. Box 157, Kentland, IN 47951, , Crow's Hybrids C2015R 2.0 Y 1.9 PI88788 Crow's Hybrids C2215R 2.2 Y 1.9 PI88788 Crow's Hybrids C2216R 2.2 Y 2.2 PI88788 Crow's Hybrids CV221R 2.2 Y 1.9 PI88788 Crow's Hybrids C2417R 2.4 Y 2.6 PI88788 Crow's Hybrids CV241R 2.4 Y 2.8 PI88788 Crow's Hybrids C2515R 2.5 Y 2.2 PI88788 Crow's Hybrids C2617R 2.6 Y 2.5 PI88788 Crow's Hybrids C2718R 2.7 Y 2.5 PI88788 Crow's Hybrids CV271R 2.7 Y 3.2 PI88788 Crow's Hybrids C2815R 2.8 Y 2.3 PI88788 Crow's Hybrids CV281R 2.8 Y 3.2 PI88788 Crow's Hybrids C2917R 2.9 Y 2.5 PI88788 Crow's Hybrids C2918R 2.9 Y 1.8 PI88788 Dairyland Seed Co., Inc., 3570 Hwy. H, West Bend, WI 53095, , Dairyland 2000/RRSTS 2.0 Y 2.2 PI88788 Dairyland 22/STS-UL 2.2 N 2.5 Not Given Dairyland 2200/RR 2.2 Y 2.4 Not Given Dairyland 221/RR 2.2 Y 2.4 Not Given Dairyland 2300/RR 2.3 Y 2.0 Not Given Dairyland 234/RR 2.3 Y 2.7 Not Given Dairyland 2600/RR 2.6 Y 2.5 Not Given Dairyland 2770/RR 2.8 Y 2.0 Not Given Dairyland 2820/RR 2.8 Y 2.6 Not Given Dairyland 2850/RRSTSHP 2.8 Y 1.8 Hartwig/Peking Dairyland 2929/RR 2.9 Y 2.8 PI88788 Dairyland 297/RR 2.9 Y 2.7 Not Given Davis Seed Company, Hwy. J5T, Moravia, IA 52571, Davis Seed 3727 RRCN 2.7 Y 2.2 PI88788 Davis Seed 3728 RRCN 2.8 Y 1.7 PI88788 Davis Seed 3629 RRCN 2.9 Y 2.4 PI

8 Table 2. Soybean cyst nematode-resistant soybean varieties for maturity group II, continued. Dyna-Gro Seeds, 104 Harrison, Emmetsburg, IA 50536, , Dyna-Gro Seeds 31D Y 1.8 PI88788 Dyna-Gro Seeds 37Y Y 1.5 PI88788 Dyna-Gro Seeds 34B Y 1.5 PI88788 Dyna-Gro Seeds 36F Y 1.5 PI88788 Dyna-Gro Seeds 38G Y 1.8 PI88788 Dyna-Gro Seeds 31K Y 1.8 PI88788 Dyna-Gro Seeds 34Y Y 1.8 PI88788 Dyna-Gro Seeds 31A Y 1.8 PI88788 Dyna-Gro Seeds 33D Y 1.8 PI88788 Dyna-Gro Seeds 35J Y 2.2 PI88788 Dyna-Gro Seeds 36C Y 1.0 PI88788 Dyna-Gro Seeds 39R Y 1.5 PI88788 Dyna-Gro Seeds 35P Y 1.8 PI88788 Excel Brand, 116 E. State, Camp Point, IL 62320, EXCEL 8211NRR 2.1 Y 2.5 PI88788 EXCEL 8236NRR 2.3 Y 2.7 Not Given EXCEL 7257HPSTS 2.5 N 3.0 Hartwig/Peking EXCEL 6260N 2.6 N 2.5 PI88788 EXCEL 8260NNRR 2.6 Y 2.7 PI88788 EXCEL 8271NRR 2.7 Y 2.5 PI88788 EXCEL 8274NRR 2.7 Y 2.5 PI88788 EXCEL 6303N 2.8 N 2.9 PI88788 EXCEL 8266NRR 2.8 Y 2.6 PI88788 EXCEL 8288NNRR 2.8 Y 2.8 PI88788 EXCEL 8291NNRR 2.8 Y 2.4 PI88788 Farm Advantage, 1275 Hwy. 69, Belmond, IA 50421, , farmadv@kalnet.com, Farm Advantage 7204N 2.0 Y 2.5 PI88788 Farm Advantage 2134N 2.1 N 2.2 Peking Farm Advantage 7214N 2.1 Y 2.2 PI88788 Farm Advantage 7223N 2.2 Y 2.0 PI88788 Farm Advantage 7233N 2.3 Y 2.0 PI88788 Farm Advantage 7254N 2.5 Y 2.0 PI88788 Farm Advantage 7273N 2.7 Y 2.6 PI88788 Farm Advantage 2955N 2.9 N 2.6 PI88788 Farm Advantage 7296N 2.9 Y 3.1 PI88788 Fontanelle Hybrids, th St., Fontanelle, NE , , spike@fontanelle.com, Fontanelle 8705 NRR 2.0 Y 2.2 PI88788 Fontanelle 22L Y 1.7 PI88788 Fontanelle 8622 NRR 2.2 Y 1.9 PI88788 Fontanelle 24L Y 2.8 PI88788 Fontanelle 8749 NRR 2.4 Y 1.7 PI88788 Fontanelle 8460 NRR 2.6 Y 2.3 PI88788 Fontanelle 8665 NRR 2.6 Y 1.8 PI88788 Fontanelle 27L Y Not Given PI88788 Fontanelle 8777 NRR 2.7 Y 2.2 PI88788 Fontanelle 8687 NRR 2.8 Y 2.5 PI88788 Four Star Seed Company, th St., Logan, IA 51546, , 4 STAR SEED CO. 2123RR 2.1 Y 2.0 PI STAR SEED CO. 2251RR 2.4 Y 2.2 PI STAR SEED CO. 2262RR 2.6 Y 1.8 PI STAR SEED CO. 2271RR 2.6 Y 2.4 PI STAR SEED CO. 2285RR 2.8 Y 2.0 PI STAR SEED CO. 2291RR 2.9 Y 3.0 PI

9 Table 2. Soybean cyst nematode-resistant soybean varieties for maturity group II, continued. Garst Seed Company, th Street, Slater, IA 50244, 888-GO-GARST, Garst 2251RR/N 2.2 Y 1.0 PI88788 NK S22-F5 2.2 Y 3.0 PI88788 NK S26-V6 2.6 Y 4.0 PI88788 Garst 2721RR/N 2.7 Y 1.0 PI88788 NK S28-Y2 2.8 Y 3.0 PI88788 NK S29-J6 2.9 Y 3.0 PI88788 Golden Harvest, P.O. Box 307, Waterloo, NE 68069, , NK H-2694RR 2.6 Y 2.0 PI88788 NK H-2752RR 2.7 Y 4.0 PI88788 NK S Y 4.0 PI88788 Great Lakes Hybrids, 9915 W M-21, Ovid, MI 48866, , Great Lakes Hybrids GL 2119RR 2.1 Y 2.2 PI88788 Great Lakes Hybrids GL 2299V2 2.2 Y 1.7 PI88788 Great Lakes Hybrids GL 2439RR 2.4 Y 2.0 PI88788 Great Lakes Hybrids GL 2499V2 2.4 Y Not Given PI88788 Great Lakes Hybrids GL 2619RR 2.6 Y 2.5 PI88788 Great Lakes Hybrids GL 2696V2 2.6 Y Not Given PI88788 Great Lakes Hybrids GL 2719RR 2.7 Y 2.5 PI88788 Great Lakes Hybrids GL 2799V2 2.7 Y Not Given PI88788 Great Lakes Hybrids GL 2889RR 2.8 Y Not Given PI88788 Great Lakes Hybrids GL 2929RR 2.9 Y 1.5 PI88788 GROWMARK, Inc., 1701 Towanda Avenue, Bloomington, IL 61702, , HiSOY@growmark.com, FS HiSOY HS Y 2.2 PI88788 FS HiSOY HS Y 2.3 PI88788 FS HiSOY HS 22V Y 2.2 PI88788 FS HiSOY HS 25R Y 2.6 PI88788 FS HiSOY HS Y 2.8 PI88788 FS HiSOY HS Y 2.5 PI88788 FS HiSOY HS 2869V 2.8 Y Not Given PI88788 FS HiSOY HS N 3.1 PI88788 Hoegemeyer Hybrids, 1755 Hoegemeyer Rd., Hooper, NE 68031, 800-AG Line-1 ( ), askus@hoegemeyer.com, Hoegemeyer Hybrids 206NRR 2.0 Y 2.1 PI88788 Hoegemeyer Hybrids 239NRR 2.3 Y 1.9 PI88788 Hoegemeyer Hybrids 242NRR 2.4 Y 2.8 PI88788 Hoegemeyer Hybrids 263NRR 2.5 Y 1.8 PI88788 Hoegemeyer Hybrids 279NRR 2.8 Y 1.8 PI88788 Hoegemeyer Hybrids 293NRR 2.9 Y 2.5 PI88788 Iowa State University Research Foundation, 310 Lab of Mechanics, Ames, IA , , ISU IA N 3.9 PI88788 ISU AR1 2.0 N Not Given PI88788 ISU IA2036LF 2.0 N 3.3 PI88788 ISU IA N 3.1 PI88788 ISU IA N Not Given PI88788 Kaltenberg Seeds, P.O. Box 278, 5506 State Rd. 19, Waunakee, WI , , ksfseeds@chorus.net, Kaltenberg KB226RR 2.2 Y 3.0 PI88788 Kaltenberg KB237RR 2.3 Y 3.0 PI88788 Kaltenberg KB247RR 2.4 Y 3.0 PI88788 Kaltenberg KB249RR 2.4 Y 3.0 PI88788 Kaltenberg KC N 3.0 PI88788 Kaltenberg KB257RR 2.5 Y 2.0 PI88788 Kaltenberg KC N 3.0 PI88788 Kaltenberg KB278RR 2.7 Y 3.0 PI

10 Table 2. Soybean cyst nematode-resistant soybean varieties for maturity group II, continued. Kruger Seeds, Inc., P.O. Box A, Dike, IA 50624, , Kruger K-195+RR/SCN 2.0 Y 2.5 PI88788 Kruger K-201RR/SCN 2.0 Y 2.5 PI88788 Kruger K-204RR/SCN 2.0 Y 2.5 PI88788 Kruger K-220RR/SCN/LINO 2.2 Y 2.0 PI88788 Kruger K-222RR/SCN 2.2 Y 2.5 PI88788 Kruger K-228RR/SCN 2.2 Y 3.0 PI88788 Kruger K-245RR/SCN/LINO 2.4 Y 2.5 PI88788 Kruger K-247RR/SCN 2.4 Y 2.0 Peking Kruger K-248RR/SCN 2.4 Y 3.0 PI88788 Kruger K-251RR/SCN 2.5 Y 2.5 PI88788 Kruger K-263RR/SCN/LINO 2.6 Y 3.5 PI88788 Kruger K-275RR/SCN 2.6 Y 2.5 PI88788 Kruger K-272RR/SCN/LINO 2.7 Y 3.0 PI88788 Kruger K-274RR/SCN 2.7 Y 2.5 PI88788 Kruger K-278RR/SCN 2.7 Y 3.5 PI88788 Kruger K-285RR/SCN 2.8 Y 3.0 PI88788 Kruger K-287RR/SCN 2.8 Y 2.0 PI88788 Kruger K-283RR/SCN 2.9 Y 2.5 PI88788 Kruger K-294RR/SCN 2.9 Y 2.5 Peking Kruger K-297RR/SCN 2.9 Y 2.0 PI88788 Latham Seed Company, th St., Alexander, IA 50420, , LATHAM L2038R 2.0 Y 2.3 PI88788 LATHAM L2085R 2.0 Y 2.4 PI88788 LATHAM L N 1.9 Peking LATHAM L2158R 2.1 Y 1.9 PI88788 LATHAM E2238RV 2.2 Y 1.7 PI88788 LATHAM E2285R 2.2 Y 2.2 PI88788 LATHAM E2348R 2.3 Y 2.1 PI88788 LATHAM L N 2.5 PI88788 LATHAM E2458RV 2.4 Y 2.8 PI88788 LATHAM E2538R 2.5 Y 2.2 PI88788 LATHAM E2658R 2.6 Y 2.3 PI88788 LATHAM L2620RX 2.6 Y 2.6 CystX LATHAM L2780RV 2.7 Y 2.9 PI88788 LATHAM L N 2.4 PI88788 LATHAM E2883R 2.8 Y 1.8 PI88788 LATHAM E2983R 2.9 Y 1.7 PI88788 LG Seeds, Shissler Rd., Elmwood, IL 61529, , info@lgseeds.com, LG Seeds C2239NRR 2.2 Y 1.5 PI88788 LG Seeds L2250NRR 2.2 Y 1.5 PI88788 LG Seeds L2450NRR 2.4 Y 3.0 PI88788 LG Seeds L2650NRR 2.6 Y 3.0 PI88788 LG Seeds C2662NRR 2.6 Y 3.0 PI88788 LG Seeds C2777NRR 2.7 Y 2.0 PI88788 LG Seeds L2850NRR 2.8 Y 3.0 PI88788 LG Seeds C2873N 2.8 N 2.5 PI88788 LG Seeds C2985NRR 2.9 Y 2.0 PI

11 Table 2. Soybean cyst nematode-resistant soybean varieties for maturity group II, continued. Merschman Seeds, Inc., 103 Avenue D, West Point, IA 52626, , Merschman Navaho 720RR 2.0 Y 2.3 PI88788 Merschman Mohawk 822RRV 2.2 Y 2.0 PI88788 Merschman Mohegan 823RR 2.3 Y 2.2 PI88788 Merschman Comanche 725RR 2.5 Y 2.0 PI88788 Merschman Shawnee 527RR 2.7 Y 2.7 PI88788 Merschman Cheyenne 827RRV 2.7 Y 2.5 PI88788 Merschman Chickasaw 728RR 2.8 Y 2.2 PI88788 Merschman Apache 828RR 2.8 Y 1.5 PI88788 Merschman Cherokee 729RR 2.9 Y 2.7 PI88788 Midwest Seed Genetics, 1617 E 10th St., P.O. Box 518, Carroll, IA 51401, , Midwest Seed Genetics GR Y 1.9 PI88788 Midwest Seed Genetics GR Y 1.9 PI88788 Midwest Seed Genetics GR Y 2.2 PI88788 Midwest Seed Genetics RV Y 1.9 PI88788 Midwest Seed Genetics GR Y 2.6 PI88788 Midwest Seed Genetics RV Y 2.8 PI88788 Midwest Seed Genetics GR Y 2.2 PI88788 Midwest Seed Genetics GR Y 2.5 PI88788 Midwest Seed Genetics GR Y 2.5 PI88788 Midwest Seed Genetics RV Y 3.2 PI88788 Midwest Seed Genetics GR Y 2.3 PI88788 Midwest Seed Genetics RV Y 3.2 PI88788 Midwest Seed Genetics GR Y 2.5 PI88788 Midwest Seed Genetics GR Y 1.8 PI88788 Monsanto Agriculture Research, 3843 Terrace Hill Dr. NE, Cedar Rapids, IA 52402, ASGROW AG Y 2.0 PI88788 ASGROW AG Y 1.5 PI88788 ASGROW AG Y 2.0 PI88788 ASGROW AG2222V 2.2 Y 2.5 PI88788 ASGROW AG2422V 2.4 Y 2.5 PI88788 ASGROW AG2423V 2.4 Y 2.5 PI88788 ASGROW AG Y 3.0 PI88788 DEKALB DKB Y 2.5 PI88788 ASGROW AG2521V 2.5 Y 2.5 PI88788 ASGROW AG Y 3.5 PI88788 ASGROW AG Y 3.0 PI88788 DEKALB DKB Y 2.0 PI88788 ASGROW AG2822V 2.8 Y 3.0 PI88788 ASGROW AG Y 2.0 PI88788 ASGROW AG2921V 2.9 Y 2.5 PI88788 ASGROW AG Y 1.5 PI88788 Munson Hybrids, Inc, 1262 Knox Road 100 E, Galesburg, IL 61401, , Munson 8287RR 2.8 Y 2.4 PI88788 Munson 8298RR 2.9 Y 3.0 PI88788 Mustang Seeds, 306 S. Washington, Madison, SD 57042, , Mustang M-217NRR 2.1 Y 1.9 PI88788 Mustang M-228NRR 2.2 Y 2.1 PI88788 Mustang M-246NRR 2.4 Y 2.7 PI88788 Mustang M-277NRR 2.7 Y 2.3 PI88788 Mycogen Seeds, 9330 Zionsville Rd., Indianapolis, IN 46268, , Atlas Mycogen 5N203RR 2.0 Y 1.5 PI88788 Atlas Mycogen 5N232RR 2.3 Y 2.0 PI88788 Atlas Mycogen 5N272RR 2.8 Y 2.0 PI

12 Table 2. Soybean cyst nematode-resistant soybean varieties for maturity group II, continued. Naylor Seed Co., th Ave., Scotch Grove, IA , , EXCEL 8236NRR 2.3 Y 2.7 PI88788 EXCEL 8260NNRR 2.6 Y 2.7 PI88788 NC+ Hybrids, 3820 N. 56th St., P.O. Box 4408, Lincoln, NE 68504, , NC+ Hybrids 2A14RR 2.1 Y 1.9 PI88788 NC+ Hybrids 2V21RR 2.2 Y 1.9 PI88788 NC+ Hybrids 2A30RR 2.3 Y 1.9 PI88788 NC+ Hybrids 2A35RR 2.3 Y 2.2 PI88788 NC+ Hybrids 2A45RR 2.4 Y 2.6 PI88788 NC+ Hybrids 2V41RR 2.4 Y 2.8 PI88788 NC+ Hybrids 2A54RR 2.5 Y 2.2 PI88788 NC+ Hybrids 2A78RR 2.7 Y 2.5 PI88788 NC+ Hybrids 2V71RR 2.7 Y 3.2 PI88788 NC+ Hybrids 2A94RR 2.9 Y 2.5 PI88788 NC+ Hybrids 2A95RR 2.9 Y 1.8 PI88788 NuTech Seed LLC, Hwy. 69N, Forest City, IA 50436, , NuTech Y 2.6 PI88788 NuTech 212CN 2.1 N 2.5 Peking NuTech Y 2.7 PI88788 NuTech 2219VRR/SCN 2.2 Y 2.3 PI88788 NuTech 2324+RR/SCN 2.3 Y 2.9 PI88788 NuTech 236CN 2.3 N 2.6 Peking NuTech Y 2.4 PI88788 NuTech 5244V 2.4 Y 2.6 PI88788 NuTech Y 2.0 PI88788 NuTech 1617RR/SCN 2.5 Y 2.5 PI88788 NuTech 257CN 2.5 N 2.3 Peking NuTech 2660RR/SCN 2.6 Y 1.9 PI88788 NuTech Y 2.4 PI88788 NuTech 5277V 2.7 Y 3.6 PI88788 NuTech Y 2.5 PI88788 NuTech 5288V 2.8 Y 2.5 PI88788 NuTech 293CN 2.9 N 2.4 PI88788 Ottilie RO Seed, 1462 Sanford Avenue, Marshalltown, IA 50158, , OttilieRO@hughes.net Ottilie RO Seed 8201RRN 2.0 Y 2.2 PI88788 Ottilie RO Seed 8218RRN 2.1 Y 2.1 PI88788 Ottilie RO Seed 8241RRN 2.4 Y 2.2 PI88788 Ottilie RO Seed 8269RRN 2.6 Y 2.3 PI88788 Ottilie RO Seed 8272RRN 2.7 Y 1.7 PI88788 Ottilie RO Seed 8290RRN 2.9 Y 2.5 PI88788 Ottilie RO Seed 8291RRN 2.9 Y 3.0 PI88788 Pannar Seed, US Hwy. 14 East, Huron, SD 57350, , info@pannarusa.com, Pannar 2510NRR 2.5 Y 2.2 PI88788 Pioneer Hi-Bred International, Inc., 8100 South 15th St., Lincoln, NE 68512, , Pioneer Hi-Bred Int. 92M Y 5.0 PI88788 Pioneer Hi-Bred Int. 92M Y 3.0 Peking Pioneer Hi-Bred Int. 92M Y 4.0 PI88788 Pioneer Hi-Bred Int. 92M Y 4.0 PI88788 Pioneer Hi-Bred Int. 92M Y 3.0 Peking Pioneer Hi-Bred Int. 92M Y 4.0 PI88788 Pioneer Hi-Bred Int. 92M Y 3.0 PI88788 Pioneer Hi-Bred Int. 92M Y 3.0 Peking Pioneer Hi-Bred Int. 92M Y 3.0 PI

13 Table 2. Soybean cyst nematode-resistant soybean varieties for maturity group II, continued. Prairie Brand Seed, 15 X Ave., Story City, IA 50248, , Prairie Brand PB 2007NRR 2.0 Y 2.2 PI88788 Prairie Brand PB 2056NRR 2.0 Y 2.3 PI88788 Prairie Brand PB 2117NRR 2.1 Y 2.4 PI88788 Prairie Brand PB 2183NRR 2.1 Y 2.1 PI88788 Prairie Brand PB 2196NRR 2.1 Y 2.2 PI88788 Prairie Brand PB 2207NRR 2.2 Y 2.2 PI88788 Prairie Brand PB 2236NRR 2.2 Y 2.0 PI88788 Prairie Brand PB 2297NRR 2.2 Y 2.1 PI88788 Prairie Brand PB 2316NRR 2.3 Y 2.9 PI88788 Prairie Brand PB 2337NRR 2.3 Y 1.9 PI88788 Prairie Brand PB 2557NRR 2.5 Y 2.2 PI88788 Prairie Brand PB 2636NRR 2.6 Y 2.5 PI88788 Prairie Brand PB 2667NRR 2.6 Y 1.8 PI88788 Prairie Brand PB 2697NRR 2.6 Y 2.8 PI88788 Prairie Brand PB 2794NRR 2.7 Y 2.3 PI88788 Prairie Brand PB 2897NRR 2.8 Y 1.8 PI88788 Prairie Brand PB 2907NRR 2.8 Y 1.5 PI88788 Quality Plus Seed, 562 State Highway 164, Monmouth, IL 61462, Quality Plus Q293RR 2.9 Y 2.5 PI88788 Rainbow Seeds, 1816 Hwy. 163, Oskaloosa, IA 52577, , Rainbow Seeds 4255NRR 2.5 Y 1.8 PI88788 Rainbow Seeds 4278NRR 2.8 Y 1.8 PI88788 Rainbow Seeds 4281NRR 2.8 Y 1.7 PI88788 Renk Seed, 6809 Wilburn Rd., Sun Prairie, WI 53590, 800-BUY-RENK, arenk@renkseed.com, Renk Seed rs204nrr 2.0 Y 2.0 PI88788 Renk Seed rs247nrr 2.4 Y 3.2 PI88788 Renk Seed rs277nrr 2.7 Y 2.4 PI88788 Renze Hybrids, Kittyhawk Ave., Carroll, IA 51401, , renze@netins.net, Renze R2094RRcn 2.0 Y 2.0 PI88788 Renze R2287RRcn 2.2 Y 1.8 PI88788 Renze R2388RRcn 2.3 Y 1.8 PI88788 Renze R2588RRcn 2.5 Y 2.2 PI88788 Renze R2887RRcn 2.8 Y 2.2 PI88788 Renze R2996RRcn 2.9 Y 2.5 PI88788 Schillinger Seed, Inc., 4200 Corporate Drive, Suite 106, West Des Moines, IA 50266, x 104, cnikkel@schillingerseed.com, Schillinger 228.RCP 2.2 Y 1.9 PI88788 Schillinger 258F.HPC 2.5 N 2.1 PI88788 Schillinger 287.RCP 2.7 Y 1.7 PI88788 Sand Seed Service, Inc., 4765 Hwy. 143, Marcus, IA 51035, , soi@sandsofiowa.com, Sands of Iowa SOI 2122NRR 2.1 Y 2.0 PI88788 Sands of Iowa SOI 2151NRR 2.1 Y 2.0 PI88788 Sands of Iowa SOI 2307NRR 2.3 Y 2.1 PI88788 Sands of Iowa SOI 2341NRR 2.3 Y 2.5 PI88788 Sands of Iowa SOI 2467NRR 2.4 Y 3.5 PI88788 Sands of Iowa SOI 2511NRR 2.4 Y 2.0 PI88788 Sands of Iowa SOI 2532NRR 2.5 Y 2.2 PI88788 Sands of Iowa SOI 2716NRR 2.7 Y 2.3 PI88788 Sands of Iowa SOI 2895NRR 2.8 Y 2.5 PI88788 South Dakota State University, NPB247, Box 2140C, Brookings, SD SD Ag. Exp. Station Turner 2.3 N Not Given PI

14 Table 2. Soybean cyst nematode-resistant soybean varieties for maturity group II, continued. Stine Seed Company, 2255 Laredo Trail, Adel, IA 50003, , Stine Y 2.3 PI88788 Stine N 3.0 PI88788 Stine Y 2.5 PI88788 Stine N 3.0 PI88788 Stine Y 1.5 PI88788 Stine Y 2.8 PI88788 Stine Y 2.3 PI88788 Stine Y 1.8 PI88788 Stone Seed Group is comprised of the following companies. Stone Seed Company, 5965 W. State Road 97, Pleasant Plains, IL 62677, Sieben Hybrids, Inc, 1441 Gorman Drive, Geneseo, IL 61254, Moweaqua Seed Company, 600 E. Main Street, Moweaqua, IL 62550, Stone Seed Group SS2304NRR 2.3 Y 2.3 PI88788 Stone Seed Group SS2407NRR 2.4 Y 2.8 PI88788 Stone Seed Group SS2625NRR 2.6 Y 2.3 PI88788 Stone Seed Group 3A278NRR 2.7 Y 2.5 PI88788 Stone Seed Group 3BV278NRR 2.7 Y 3.5 PI88788 Stone Seed Group 3A288NRR 2.8 Y 3.5 PI88788 Stone Seed Group SS2807NRR 2.8 Y 2.4 PI88788 Stone Seed Group 3A298NRR 2.9 Y 3.5 PI88788 Stone Seed Group SS2905NRR 2.9 Y 2.5 PI88788 Trisler Seeds, Inc., 3274 E 800 North Rd., Fairmount, IL 61841, trisler@trisler.com, Trisler Trisoy 2002RR(CN) 2.0 Y 2.0 PI88788 Trisler Trisoy 2070RR(CN) 2.0 Y 2.0 PI88788 Trisler Trisoy 2333RR(CN) 2.3 Y 2.0 PI88788 Trisler Trisoy 2471RRV(CN) 2.4 Y 2.0 PI88788 Trisler Trisoy 2575RR(CN) 2.5 Y 2.0 PI88788 Trisler Trisoy 2777RR(CN) 2.7 Y 3.0 PI88788 Trisler Trisoy 2878RRV(CN) 2.8 Y 3.0 PI88788 Trisler Trisoy 2952RR(CN) 2.9 Y 2.0 PI88788 Trisler Trisoy 2973RR(CN) 2.9 Y 1.0 PI88788 University of Illinois, 1101 W. Peabody Dr., Urbana, IL 61801, IL Ag. Exp. Station Jack 2.9 N Not Given PI88788 IL Ag. Exp. Station Dwight 2.9 N Not Given PI88788 Welter Seed, Co., Hwy. 136, Onslow, IA , , info@welterseed.com, Welter Seed 2810N 2.8 N 3.0 PI88788 Wensman seed, West Highway 10, Wadena, MN 56482, , wensman@wensmanseed.com, Wensman seed W2200NRR 2.0 Y 2.3 PI88788 Wensman seed W2222NRR 2.2 Y 2.2 PI88788 Ziller Seed Co., Inc., th St., Bird Island, MN 55310, , zscsales@zillerseed.com, Ziller BT 7204NR 2.0 Y 1.9 PI88788 Ziller BT 7208NR 2.0 Y 2.1 PI88788 Ziller BT 7217NR 2.1 Y 2.3 PI

15 Table 3. Soybean cyst nematode-resistant soybean varieties for maturity group III. CROPLAN GENETICS, 1080 County Road F, West, MS5735, Shoreview, MN 55126, , CROPLAN GENETICS RC Y 3.0 PI88788 Crow's Hybrids, 612 E. Dunlap St., P.O. Box 157, Kentland, IN 47951, , Crow's Hybrids CV301R 3.0 Y 2.5 PI88788 Crow's Hybrids C3145R 3.1 Y 2.4 PI88788 Crow's Hybrids C3318R 3.3 Y 2.4 PI88788 Crow's Hybrids CV331R 3.3 Y Not Given PI88788 Crow's Hybrids C3418R 3.4 Y 2.2 PI88788 Crow's Hybrids C3518R 3.5 Y 2.5 PI88788 Crow's Hybrids CV351R 3.5 Y Not Given PI88788 Crow's Hybrids C3619R 3.6 Y 2.5 PI88788 Crow's Hybrids C3817R 3.8 Y Not Given PI88788 Crow's Hybrids C3915R 3.9 Y Not Given PI88788 Crow's Hybrids C3916R 3.9 Y Not Given PI88788 Dairyland Seed Co., Inc., 3570 Hwy. H, West Bend, WI 53095, , Dairyland 3003/RRSTS 3.0 Y 2.5 Not Given Dairyland 3130/RR 3.1 Y 2.5 PI88788 Dairyland 3320/RRSTS 3.3 Y 2.5 PI88788 Dairyland 3400/RR 3.4 Y 2.7 PI88788 Dairyland 345/RR 3.4 Y 2.5 Not Given Dairyland 3500/RR 3.5 Y 2.5 PI88788 Dairyland 3535/RR 3.5 Y 3.0 PI88788 Dairyland N 3.0 Not Given Dairyland 3603/RR 3.6 Y 2.5 PI88788 Dairyland 3675/RR 3.6 Y 2.9 PI88788 Dairyland 385/RR 3.8 Y 2.4 PI88788 Davis Seed Company, Hwy. J5T, Moravia, IA 52571, Davis Seed 3532 RRCN 3.2 Y 2.4 PI88788 Davis Seed 3635 RRCN 3.5 Y 2.9 PI88788 Davis Seed 3337 RRCN 3.7 Y 2.2 PI88788 Davis Seed 3737 RRCN 3.7 Y 1.7 PI88788 Dyna-Gro Seeds, 104 Harrison, Emmetsburg, IA 50536, , Dyna-Gro Seeds 32D Y 2.2 PI88788 Dyna-Gro Seeds 34N Y 2.2 PI88788 Dyna-Gro Seeds 38B Y 1.8 PI88788 Dyna-Gro Seeds 33C Y 1.8 PI88788 Dyna-Gro Seeds 35D Y 1.8 PI88788 Dyna-Gro Seeds 38P Y 2.6 PI88788 Dyna-Gro Seeds 38R Y 2.2 PI88788 Dyna-Gro Seeds 37J Y 1.5 PI88788 Dyna-Gro Seeds 35Y Y 1.8 PI88788 Dyna-Gro Seeds 35F Y 2.2 PI88788 Dyna-Gro Seeds 33A Y 2.6 PI88788 Dyna-Gro Seeds 35G Y 1.0 PI88788 Dyna-Gro Seeds 32C Y 2.2 PI

16 Table 3. Soybean cyst nematode-resistant soybean varieties for maturity group III, continued. Excel Brand, 116 E. State, Camp Point, IL 62320, EXCEL 8308NRR 3.1 Y 2.6 PI88788 EXCEL 6323N 3.2 N 2.4 PI88788 EXCEL 8322NNRR 3.2 Y 2.2 PI88788 EXCEL 8343NRR 3.4 Y 2.6 PI88788 EXCEL 6350N 3.5 N 2.6 PI88788 EXCEL 8357NNRR 3.5 Y 2.7 PI88788 EXCEL 8367NRR 3.6 Y 2.6 PI88788 EXCEL 8377NRR/STS 3.7 Y 3.2 PI88788 EXCEL 8389NRR 3.8 Y 2.9 PI88788 EXCEL 8394NRR 3.9 Y Not Given PI88788 EXCEL 8398NRR 3.9 Y 3.6 PI88788 Farm Advantage, 1275 Hwy. 69, Belmond, IA 50421, , farmadv@kalnet.com, Farm Advantage 7305N 3.0 Y 3.0 PI88788 Farm Advantage 7324N 3.2 Y 2.8 PI88788 Farm Advantage 7335N 3.3 Y 2.4 PI88788 Farm Advantage 7356N 3.5 Y 2.7 PI88788 Fontanelle Hybrids, th St., Fontanelle, NE , , spike@fontanelle.com, Fontanelle 9609 NRR 3.0 Y 2.5 PI88788 Fontanelle 9412 NRR 3.1 Y 2.4 PI88788 Fontanelle 32L Y 3.1 PI88788 Fontanelle 9633 NRR 3.3 Y 3.1 PI88788 Fontanelle 35L Y 3.0 PI88788 Fontanelle 9652 NRR 3.5 Y 2.2 PI88788 Fontanelle 9162 NRR 3.6 Y 2.5 PI88788 Fontanelle 9371 NRR 3.7 Y 2.7 PI88788 Fontanelle 9772 NRR 3.7 Y Not Given PI88788 Fontanelle 9488 RRR STS 3.8 Y 2.7 PI88788 Fontanelle 9680 NRR 3.8 Y 1.7 PI88788 Four Star Seed Company, th St., Logan, IA 51546, , 4 STAR SEED CO. 2332RR 3.3 Y 2.2 PI88788 Garst Seed Company, th Street, Slater, IA 50244, 888-GO-GARST, garstguy@garstseedco.com, Garst 3212RR/N 3.2 Y 2.0 PI88788 NK S32-E2 3.2 Y 4.0 PI88788 NK S33-A8 3.3 Y 4.0 PI88788 Garst 3512RR/N 3.5 Y 4.0 PI88788 NK S36-C7 3.6 Y 4.0 PI88788 NK S37-F7 3.7 Y 4.0 PI88788 NK S37-P5 3.7 Y 3.0 PI88788 NK S38-D5 3.8 Y 4.0 PI88788 NK S39-A3 3.9 Y 4.0 PI88788 Great Lakes Hybrids, 9915 W M-21, Ovid, MI 48866, , Great Lakes Hybrids GL 3239RR 3.2 Y 1.9 PI88788 Great Lakes Hybrids GL 3299V2 3.2 Y Not Given PI88788 Great Lakes Hybrids GL 3309RR 3.3 Y Not Given PI88788 Great Lakes Hybrids GL 3449RR 3.4 Y 2.2 PI88788 Great Lakes Hybrids GL 3509RR 3.5 Y 2.6 PI88788 Great Lakes Hybrids GL 3629RR 3.6 Y 3.5 PI88788 Great Lakes Hybrids GL 3719RR 3.7 Y Not Given PI88788 Great Lakes Hybrids GL 3849RR 3.8 Y Not Given PI

17 Table 3. Soybean cyst nematode-resistant soybean varieties for maturity group III, continued. GROWMARK, Inc., 1701 Towanda Avenue, Bloomington, IL 61702, , FS HiSOY HS 3069V 3.0 Y 3.2 PI88788 FS HiSOY HS Y 2.8 PI88788 FS HiSOY HS Y 2.7 PI88788 FS HiSOY HS Y 2.8 PI88788 FS HiSOY HS Y 2.7 PI88788 FS HiSOY HS 3569V 3.5 Y Not Given PI88788 FS HiSOY HS Y 3.2 PI88788 FS HiSOY HS Y 2.8 PI88788 FS HiSOY HS Y 3.5 PI88788 FS HiSOY HS Y 2.7 PI88788 FS HiSOY HS 38C N Not Given PI88788 Hoegemeyer Hybrids, 1755 Hoegemeyer Rd., Hooper, NE 68031, 800-AG Line-1 ( ), askus@hoegemeyer.com, Hoegemeyer Hybrids 303NRR 3.0 Y 3.1 PI88788 Hoegemeyer Hybrids 343NRR 3.3 Y 2.2 PI88788 Hoegemeyer Hybrids 371NRR 3.6 Y 2.3 PI88788 Hoegemeyer Hybrids 381NRS 3.8 Y 2.7 PI88788 Hoegemeyer Hybrids 389NRS 3.8 Y 3.1 PI88788 Hoegemeyer Hybrids 391NRR 3.9 Y 2.8 PI88788 Iowa State University Research Foundation, 310 Lab of Mechanics, Ames, IA , , ISU IA N Not Given PI88788 ISU IA N Not Given PI88788 Kaltenberg Seeds, P.O. Box 278, 5506 State Rd. 19, Waunakee, WI , , ksfseeds@chorus.net, Kaltenberg KB308RR 3.0 Y 2.0 PI88788 Kruger Seeds, Inc., P.O. Box A, Dike, IA 50624, , info@krugerseed.com, Kruger K-302RR/SCN/LINO 3.0 Y 3.0 PI88788 Kruger K-315RR/SCN 3.1 Y 3.0 PI88788 Kruger K-316RR/SCN 3.1 Y 3.0 PI88788 Kruger K-321RR/SCN/LINO 3.2 Y 3.0 PI88788 Kruger K-333RR/SCN 3.3 Y 3.0 PI88788 Kruger K-340RR/SCN 3.4 Y 3.0 PI88788 Kruger K-341RR/SCN 3.4 Y 3.0 PI88788 Kruger K-343RR/SCN/LINO 3.4 Y 3.5 PI88788 Kruger K-348RR/SCN 3.4 Y 3.0 PI88788 Kruger K-363RR/SCN 3.6 Y 3.0 PI88788 Kruger K-372RR/SCN 3.7 Y 3.0 PI88788 Kruger K-382RR/SCN 3.8 Y 2.5 PI88788 Kruger K-384RR/SCN 3.8 Y Not Given PI88788 Kruger K-389RR/SCN 3.8 Y 3.0 PI88788 Latham Seed Company, th St., Alexander, IA 50420, , LATHAM E3178R 3.1 Y 2.4 PI

18 Table 3. Soybean cyst nematode-resistant soybean varieties for maturity group III, continued. Lewis Hybrids, 530 West Maple Ave./P.O. Box 38, Ursa, IL 62376, , Lewis Hybrids N 3.0 PI88788 Lewis Hybrids Y 2.3 PI88788 Lewis Hybrids Y 2.5 PI88788 Lewis Hybrids Y Not Given PI88788 Lewis Hybrids N 3.0 PI88788 Lewis Hybrids Y 3.0 PI88788 Lewis Hybrids Y 2.3 PI88788 Lewis Hybrids Y 3.0 PI88788 Lewis Hybrids N Not Given PI88788 Lewis Hybrids Y 2.5 PI88788 Lewis Hybrids Y 3.0 PI88788 Lewis Hybrids Y Not Given PI88788 LG Seeds, Shissler Rd., Elmwood, IL 61529, , info@lgseeds.com, LG Seeds C3232NRR 3.2 Y 2.0 PI88788 LG Seeds C3242NRR 3.2 Y Not Given PI88788 LG Seeds L3250NRR 3.2 Y 3.0 PI88788 LG Seeds C3445NRR 3.4 Y 1.5 PI88788 LG Seeds L3450NRR 3.4 Y 3.5 PI88788 LG Seeds C3777NRR 3.7 Y 3.0 PI88788 LG Seeds C3884N 3.8 N Not Given PI88788 LG Seeds C3888NRR 3.8 Y 2.0 PI88788 LG Seeds C3988NRR 3.9 Y Not Given PI88788 Merschman Seeds, Inc., 103 Avenue D, West Point, IA 52626, , Merschman Hoover 730RR 3.0 Y 2.8 PI88788 Merschman Jefferson 830RR 3.0 Y 2.4 PI88788 Merschman Asoyia 3106 SCN 3.1 N Not Given PI88788 Merschman Hayes 832RRV 3.2 Y 2.7 PI88788 Merschman Coolidge 734RR 3.4 Y 2.5 PI88788 Merschman Monroe 735RR 3.5 Y 2.5 PI88788 Merschman Kennedy 836RR 3.6 Y 2.9 PI88788 Merschman Roosevelt 737RR 3.7 Y 2.3 PI88788 Merschman Washington IXRR 3.9 Y 3.0 PI88788 MFA Incorporated, 201 Ray Young Dr., Columbia, MO 65201, , banderson@mfa-inc.com, MorSoy RT 3304N 3.3 Y 2.0 PI88788 MorSoy RT 3636N 3.6 Y 2.0 PI88788 MorSoy RT 3644N 3.6 Y 2.5 PI88788 MorSoy RT 3804N 3.8 Y 2.0 PI88788 MorSoy RT 3807N 3.8 Y 2.5 PI88788 MorSoy RT 3936N 3.9 Y 2.0 PI88788 MorSoy RT 3966N 3.9 Y 2.0 PI88788 Midwest Seed Genetics, 1617 E 10th St., P.O. Box 518, Carroll, IA 51401, , Midwest Seed Genetics RV Y 2.5 PI88788 Midwest Seed Genetics GR Y 2.4 PI88788 Midwest Seed Genetics GR Y 2.4 PI88788 Midwest Seed Genetics RV Y Not Given PI88788 Midwest Seed Genetics GR Y 2.2 PI88788 Midwest Seed Genetics GR Y 2.5 PI88788 Midwest Seed Genetics RV Y Not Given PI88788 Midwest Seed Genetics GR Y 2.5 PI88788 Midwest Seed Genetics GR Y Not Given PI88788 Midwest Seed Genetics GR Y Not Given PI88788 Midwest Seed Genetics GR Y Not Given PI

19 Table 3. Soybean cyst nematode-resistant soybean varieties for maturity group III, continued. Monsanto Agriculture Research, 3843 Terrace Hill Dr. NE, Cedar Rapids, IA 52402, ASGROW AG Y 2.5 PI88788 ASGROW AG3021V 3.0 Y 3.0 PI88788 ASGROW AG3121V 3.1 Y 1.5 PI88788 ASGROW AG Y 3.0 PI88788 ASGROW AG Y 3.0 PI88788 ASGROW AG Y 1.5 PI88788 ASGROW AG Y 2.5 PI88788 ASGROW AG3521V 3.5 Y 3.0 PI88788 ASGROW AG Y 2.5 PI88788 ASGROW AG Y 3.0 PI88788 ASGROW AG Y 3.0 PI88788 ASGROW AG Y 3.0 PI88788 ASGROW AG Y 3.0 PI88788 ASGROW AG Y 3.0 PI88788 DEKALB DKB Y 3.0 PI88788 Munson Hybrids, Inc, 1262 Knox Road 100 E, Galesburg, IL 61401, , Munson 8328RR 3.2 Y 3.1 PI88788 Munson 8357RR 3.5 Y 2.2 PI88788 Munson 8377RR 3.7 Y 1.7 PI88788 Munson N 1.5 PI88788 Mycogen Seeds, 9330 Zionsville Rd., Indianapolis, IN 46268, , Atlas Mycogen 5N290RR 3.0 Y 2.5 PI88788 Atlas Mycogen 5N300RR 3.0 Y 2.5 PI88788 Atlas Mycogen 5N310RR 3.1 Y 4.0 PI88788 Atlas Mycogen 5N320RR 3.2 Y 3.0 PI88788 Atlas Mycogen 5N352RR 3.5 Y 2.5 PI88788 Atlas Mycogen 5N382RR 3.7 Y 3.0 PI88788 Atlas Mycogen 5B3821NRR 3.8 Y 3.0 PI88788 Atlas Mycogen 5N383RR 3.8 Y 2.0 PI88788 NC+ Hybrids, 3820 N. 56th St., P.O. Box 4408, Lincoln, NE 68504, , NC+ Hybrids 3V01RR 3.0 Y 2.5 PI88788 NC+ Hybrids 3A14RR 3.1 Y 2.4 PI88788 NC+ Hybrids 3A32RR 3.3 Y 2.4 PI88788 NC+ Hybrids 3A54RR 3.5 Y 2.2 PI88788 NC+ Hybrids 3A53RR 3.5 Y 2.5 PI88788 NC+ Hybrids 3V51RR 3.5 Y Not Given PI88788 NC+ Hybrids 3A62RR 3.6 Y 2.5 PI88788 NC+ Hybrids 3A85RS 3.8 Y Not Given PI88788 NC+ Hybrids 3A92RR 3.9 Y Not Given PI88788 NC+ Hybrids 3A93RR 3.9 Y Not Given PI88788 NuTech Seed LLC, Hwy. 69N, Forest City, IA 50436, , NuTech Y 2.6 PI88788 NuTech Y 2.7 PI88788 NuTech 5325V 3.2 Y 2.9 PI88788 NuTech Y 3.3 PI88788 NuTech Y 3.5 PI88788 NuTech 3737RR/SCN 3.7 Y 3.7 PI88788 NuTech 3888RR/SCN 3.8 Y 3.3 PI88788 NuTech Y 4.2 PI88788 NuTech 3909RR/SCN 3.9 Y 4.1 PI

20 Table 3. Soybean cyst nematode-resistant soybean varieties for maturity group III, continued. Ottilie RO Seed, 1462 Sanford Avenue, Marshalltown, IA 50158, , Ottilie RO Seed 8322RRN 3.2 Y 2.2 PI88788 Ottilie RO Seed 8355RRN 3.5 Y 3.1 PI88788 Ottilie RO Seed 8358RRN 3.5 Y 2.8 PI88788 Ottilie RO Seed 8373RRN 3.7 Y 1.7 PI88788 Pannar Seed, US Hwy. 14 East, Huron, SD 57350, , info@pannarusa.com, Pannar 3886NRR 3.8 Y 2.5 Not Given Pioneer Hi-Bred International, Inc., 8100 South 15th St., Lincoln, NE 68512, , Pioneer Hi-Bred Int. 93M Y 2.0 PI88788 Pioneer Hi-Bred Int. 93M N 4.0 PI88788 Pioneer Hi-Bred Int. 93M Y 4.0 PI88788 Pioneer Hi-Bred Int. 93M Y 4.0 PI88788 Pioneer Hi-Bred Int. 93M N 3.0 PI88788 Pioneer Hi-Bred Int. 93M Y 3.0 PI88788 Pioneer Hi-Bred Int. 93M Y 5.0 PI88788 Pioneer Hi-Bred Int. 93M Y 5.0 PI88788 Prairie Brand Seed, 15 X Ave., Story City, IA 50248, , Prairie Brand PB 2956NRR 3.0 Y 2.4 PI88788 Prairie Brand PB 3137NRR 3.1 Y 3.1 PI88788 Prairie Brand PB 3357NRR 3.3 Y 2.3 PI88788 Prairie Brand PB 3436NRR 3.4 Y 2.2 PI88788 Prairie Brand PB 3556NRR 3.5 Y 2.7 PI88788 Prairie Brand PB 3667NRR 3.6 Y 3.1 PI88788 Prairie Brand PB 3796NRR 3.8 Y 2.3 PI88788 Prairie Brand PB 3894NRRSTS 3.8 Y 2.7 PI88788 Prairie Brand PB 3997NRR 3.9 Y 3.3 PI88788 Purdue University, Ag. Alumni Seed Improvement Assoc., P.O. Box 158, Romney, IN 47981, , agalumni@agalumniseed.com Purdue University CL0J N Not Given PI88788 Quality Plus Seed, 562 State Highway 164, Monmouth, IL 61462, Quality Plus Q315RR 3.1 Y 2.4 PI88788 Quality Plus Q343RR 3.4 Y 2.2 PI88788 Quality Plus Q370RR 3.7 Y 2.3 PI88788 Quality Plus Q374RR 3.7 Y 2.3 P Rainbow Seeds, 1816 Hwy. 163, Oskaloosa, IA 52577, , Rainbow Seeds 4307NRR 3.0 Y 2.4 PI88788 Rainbow Seeds 4320NRR 3.2 Y 2.3 PI88788 Rainbow Seeds 4328NRR 3.2 Y 2.4 PI88788 Rainbow Seeds 4342NRR 3.4 Y 2.2 PI88788 Rainbow Seeds 4363NRR 3.6 Y 2.5 PI88788 Rainbow Seeds 4370NRR 3.7 Y 1.7 PI88788 Rainbow Seeds 4380NRS 3.8 Y 2.7 PI88788 Rainbow Seeds 4390NRS 3.9 Y 2.8 PI88788 Renk Seed, 6809 Wilburn Rd., Sun Prairie, WI 53590, 800-BUY-RENK, arenk@renkseed.com, Renk Seed rs204nrr 2.0 Y 2.0 PI88788 Renk Seed rs247nrr 2.4 Y 3.2 PI88788 Renk Seed rs277nrr 2.7 Y 2.4 PI88788 Renze Hybrids, Kittyhawk Ave., Carroll, IA 51401, , renze@netins.net, Renze R3188RRcn 3.1 Y 2.3 PI88788 Renze R3386RRcn 3.3 Y 2.3 PI88788 Renze R3497RRcn 3.4 Y 2.2 PI88788 Renze R3788RRcn 3.7 Y 2.8 PI88788 Renze R3797RRcn 3.7 Y 2.2 PI88788 Renze R3835SRcn 3.8 Y 2.6 PI